Scala allows you to try/catch any exception in a single block and then perform pattern matching against it using case blocks. The basic syntax of using try...catch in Scala is as follows:

try
{
  // your scala code should go here
} 
catch
{
  case foo: FooException => handleFooException(foo)
  case bar: BarException => handleBarException(bar)
  case _: Throwable => println("Got some other kind of exception")
}
finally
{
  // your scala code should go here, such as to close a database connection 
}

Thus, if you throw an exception, then you need to use the try...catch block in order to handle it nicely without crashing with an internal exception message:

package com.chapter3.ScalaFP
import java.io.IOException
import java.io.FileReader
import java.io.FileNotFoundException

object TryCatch {
  def main(args: Array[String]) {
    try {
      val f = new FileReader("data/data.txt")
    } catch {
      case ex: FileNotFoundException => println("File not found exception")
      case ex: IOException => println("IO Exception") 
    } 
  }
}

If there's no file named data.txt, in the path/data under your project tree, you will experience FileNotFoundException as follows:

The output of the preceding code is as follows:

File not found exception

Now, let's have a brief example of using the finally clause in Scala to make the try...catch block complete.